Richard Archie Tudor...Born NZ 1920s'

Trying to find out about my families back ground. Richard Archie Tudor was born on the west coast of New Zealand in the 1920's (I think). Apparently his grandfather was sent to NZ by his family in London and told not to go back, my grandfather would not talk about his family so I really know very little. He had two or three brothers, one was K.I.A. in WWII in Italy and that's about it. Any help would be great!